Janome MyLock Serger Cloth Guide As its name suggests, this guide helps keep your seams straight as you sew. Especially useful on flatlock seams. Cloth Guide for use with AT2000D, 103, 1110DX, 134D, 203, 204D, 234, 234D, 303, 304D, 334, 334D, 3434D, 434D, 504D, 534D, 6234XL, 634D, 644D, 7034D Magnolia, 734D, 744D, 7933 Harmony, 8002D, 9102D, 9200D